In a small island off the American coast, the Whateleys live in an old mill where a mysterious bloody being creates an atmosphere of horror. After her parents get killed by lightning, young Susannah is sent to New York by her aunt Agatha, who wants her to avoid the family curse. Years later Susannah, now married, persuades her husband to spend a holiday in the abandoned mill. Once on the island, Susannah and Mike soon find themselves exposed to the hostility of a gang of thugs led by Ethan, Susannah's brutal cousin.
Unfortunately the movie The Shuttered Room is not yet available on HBO Max.
| Directing | David Greene | Director |
| Writing | H.P. Lovecraft | Book |
| Camera | Ken Hodges | Director of Photography |
| Writing | August Derleth | Book |
| Costume & Make-Up | Caroline Mott | Costume Design |
| Writing | Nat Tanchuck | Writer |
| Writing | D.B. Ledrov | Writer |
| Camera | Herbert Smith | Camera Operator |
| Production | Alexander Jacobs | Associate Producer |
| Sound | Basil Kirchin | Original Music Composer |
| Costume & Make-Up | Eileen Warwick | Hairdresser |
| Costume & Make-Up | Harry Frampton | Makeup Artist |
| Editing | Brian Smedley-Aston | Editor |
| Sound | Don Challis | Sound Editor |
| Sound | Kevin Sutton | Sound Mixer |
| Sound | Jack Harding | Original Music Composer |
| Production | Frederick Yale | Casting |
| Production | Bernard Schwartz | Executive Producer |
| Costume & Make-Up | Hylan Booker | Costume Designer |
| Production | Phillip Hazleton | Producer |
| Art | Brian Eatwell | Art Direction |
